(Yes you can.)
Yaven'Gan looked over the small village, it only had a population of around five hundred. He would need more. He spoke with one of the villagers:
"Slave, where is the nearest large town?"
"Two days travel to the north, my lord."
"How large is it?"
"Many thousand people live there, my lord."
He simply signaled for the army to move, and they took to the air. They reached the town within five hours. It was called Veratis, fifty thousand people made their home there. Yaven'Gan decided that before he took control of this town he would need to improve his physical form.
He sat down and meditated for a few hours. During this time his body grew, and he no longer looked like a child, but like a full-grown man. He already felt more powerful, his new body able to channel more of his old power.
(Improve body: 1PP)
Then he flew alone into the town, and landed on the town square. A few guards came, to see what this creature was.
"Take me to your king!" Yaven'Gan demanded.
The guard laughed: "Why would I do that, beast? I think we shall kill you instead."
They charged Yaven'Gan, the first to reach him was promptly killed, his heart ripped out.
"Do you wish to join your friend here?" He said and held his heart aloft. The other guards were scared by this display of power and ran. Yaven'Gan picked up the sword the dead guard had dropped and headed for the large building in the center of town, where he assumed that the king lived.
He decided that he should come in through the window rather than the door. They would surely not expect that. He flew through the window, and landed in the middle of a large room, an old fat man sat on a throne in one end of it.
"Who are you? Guards! Guards!"
"I am your lord and master, bow before me or I shall send you to the underworld!"
The king did not believe him, the god that had enslaved his people was nothing like this creature before him.
A dozen guards rushed into the room and attacked Yaven'Gan. He quite easily killed them all and then walked up to the king.
"Surrender your crown to me, or I shall take your head as well!"
The king gave him the crown and ran, as far away as he could, which wasn't very far actually. He died from a heart attack after about ten minutes of running.
Yaven'Gan put the crown on his head and ordered the demons to enter the city. Again the populace surrendered when they recognized the demons.
From this city he could build his empire.